Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:37:19 2013

Optimize a model with 37942 rows, 37332 columns and 148962 nonzeros
Presolve removed 61 rows and 0 columns
Presolve time: 0.16s
Presolved: 37881 rows, 37332 columns, 148901 nonzeros
Variable types: 37271 continuous, 61 integer (61 binary)

Root relaxation: objective 6.098174e+04, 6669 iterations, 4.56 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 60981.7431    0   50          - 60981.7431     -      -    4s
H    0     0                    88402.000000 60981.7431  31.0%     -    8s
     0     0 80898.7649    0    5 88402.0000 80898.7649  8.49%     -   11s
H    0     0                    84861.499784 80898.7649  4.67%     -   11s
H    0     0                    83940.000000 80898.7649  3.62%     -   11s
H    0     0                    83842.000000 80898.7649  3.51%     -   11s
     0     0 81731.5000    0    2 83842.0000 81731.5000  2.52%     -   11s
H    0     0                    83383.000000 81731.5000  1.98%     -   11s
H    0     0                    83131.000000 81731.5000  1.68%     -   12s
     0     0 82030.7426    0    2 83131.0000 82030.7426  1.32%     -   12s
H    0     0                    82195.000000 82030.7426  0.20%     -   12s
     0     2 82043.9224    0    2 82195.0000 82043.9224  0.18%     -   13s
*    3     3               2    82177.000000 82146.5897  0.04%   168   13s
*    6     1               3    82176.000000 82155.1081  0.03%   106   13s

Cutting planes:
  Implied bound: 55

Explored 8 nodes (12652 simplex iterations) in 13.41 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.217600000000e+04, best bound 8.217600000000e+04, gap 0.0%